In Apple’s preview press release on iOS 11, Apple Pay Cash was the only feature advertised that had the label “coming this fall.” Apple Pay Cash will be available after an update to iOS 11.

When Apple Pay Cash does arrive, users will use the feature on their Messages app by tapping on the App Store icon at the bottom, selecting Apple Pay from the app drawer and selecting the price and the debit or credit card stored on the Wallet app.

The new feature will securely authenticate with Touch ID or Face ID, a new facial-recognition feature only available on iPhone X, which will be released in November. It will also work on iPads and Apple Watches.

Siri, Apple’s intelligent personal assistant, will also play a factor in Apple Pay Cash. When a user types keywords relevant to mobile payment, such as “you owe me $X,” Siri will automatically prompt the user to send a payment.

Venmo and Square Cash already offer their own iMessages apps to provide a Pay Cash-like experience, but Apple has an advantage of owning the platform itself and possibly providing a more seamless user experience.

Apple enters the mobile payment stage at a time when competition is growing. In addition to long-established players such as Venmo, PayPal and Square Cash, Zelle launched its own iOS app in June with the backing of more than 30 U.S. banks.